I have a form on my admin page of my component, and I can edit the fields and save them.
When I load the page the saved fields show.
Say for example in a blog_category menu item. I create a new menu item based on this and I add a new field to the XML. I want to populate that field with two of the other fields.
So when I open my menu item to edit the values I want the value of my new field to say contain the title and the meta description. How do I get the existing values?